"Potentially invasive plants" are non-native species not currently known to be naturalized in Massachusetts, but that can be expected to become invasive within minimally managed habitats within the Commonwealth.  As defined here, "species" includes all synonyms, subspecies, varieties, forms, and cultivars of that species unless proven otherwise by a process of scientific evaluation.

Arthraxon hispidus (Thunb.) Makino (Hairy joint grass; jointhead; small carpetgrass)

An annual grass historically known from Franklin County but not currently known from the state.  Habitats elsewhere include roadsides, shores, ditches, and low woods and fields.   Grows in full to partial shade.  Is problematic in Connecticut and southward.

Carex kobomugi Ohwi   (Japanese sedge; Asiatic sand sedge)

A perennial sedge established mainly in sand dunes and growing in full sun.  There is only one current New England location--in Rhode Island; it can spread rapidly in dune systems.

Lonicera maackii (Rupr.) Herder  (Amur honeysuckle)

A shrub having specimens and reports from a number of MA counties, but verification of naturalization at these locations is needed.  The likely habitats are woods and woodland edges.  Can grow in full sun or shade.  Escapes from cultivation, but documentation needed regarding naturalized populations in MA; recognized as invasive in the Midwest and portions of the southeastern USA.

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